User manual SONY TC-K620

[. . . ] Dolby* HX PRO system for higher the linearity in the tape's highrange response during recording. Bias and recording level calibration to obtain the best recording conditions for every tape. Three-head system (separate recording, playback and erase heads) which allows you to instantly check the recorded sound while recording is in progress. * Dolby noise reduction and HX Pro headroom extension manufactured under license from Dolby Laboratories Licensing Corporation. [. . . ] The Dolby S NR system provides the highest reduction in tape hiss noise in both low and high frequencies. The Dolby HX PRO system works only during recording, not during playback. Through its ability to detect the blank space between selections, the Multi-AMS function allows you to skip up to 30 selections while fast forwarding or reversing to the beginning of a specific selection. During playback, press ) or 0 as many times as the number of selections to be skipped. For selections after the current one: Press ) the required number of times. For selections before the current one: Press 0 the required number of times*. * Pressing 0 once locates the beginning of the current selection. Each time the unit detects a blank space, the indicated Multi-AMS number decreases by one. When the beginning of the specific selection is reached, the counter indication appears again and playback automatically restarts. Press the 0 or ) button at any time, even during Multi-AMS operation. The Multi-AMS number may change as you are setting it The Multi-AMS may fail to detect the start of a selection in the following cases: If you press the ) button immediately before the selection or the 0 button immediately after the start of the selection. We do not recommend the use of cassettes longer than 90 minutes except for long continuous playback. The proper recording level, which differs according to the tape type, is indicated on the peak level meters for each tape type. A shows the recommended maximum peak level meter readings. Setting the recording level too low will produce a hissing sound, while setting it too high will produce distortion. Generally, the proper recording level for high and low frequencies is lower than that for middle frequencies. When recording program sources with many high and low frequencies, set the level to a relatively low position, then make adjustments according to the recording results. If your tuner does not have an MPX filter, or, if equipped, the filter is not working effectively, set the MPX FILTER button to ON (the FILTER indicator appears) when recording FM broadcasts with the Dolby NR system. the MPX filter eliminates remnants of the 19-kHz stereo carrier and 38-kHz subcarrier signals which may impair the operation of the Dolby NR system. Be sure to turn on the DOLBY NR switch since the MPX filter will not function otherwise. As this unit has three separate heads for recording, playback and erasure, you can check the quality of a recorded sound by comparing it with the input source signal. A ) To listen to the sound recorded on the tape, press the MONITOR button to turn on the TAPE indicator. [. . . ] Even when the recording level is adjusted correctly, a tape with low sensitivity will result in a low playback level. The REC LEVEL calibration control allows you to compensate for sensitivity differences among tapes to equalize both recording and playback levels. This is especially important when using the Dolby NR system, since the system is most effective when recording and playback levels are the same. Follow the procedure below to calibrate the bias current and recording level. [. . . ]